import java.util.LinkedList;

/**
 * Created by hasee on 2017/9/26.
 */
public class Linked {
    LinkedList list = new LinkedList();
    public boolean isEmpty(){
        if(list.size() == 0)
        return true;
        else
            return false;
    }
    public boolean remove(String a){
        return false;
    }
    public boolean contains(String a){
        return false;
    }
    public boolean add(String a){
        return false;
    }


}
